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memstick/mspro_block: simplify refcounting
[linux-2.6-block.git] / drivers / memstick / core / mspro_block.c
CommitLineData
d2912cb1 1// SPDX-License-Identifier: GPL-2.0-only
baf8532a
AD		 2/*
3 * Sony MemoryStick Pro storage support
4 *
5 * Copyright (C) 2007 Alex Dubov <oakad@yahoo.com>
6 *
baf8532a
AD		 7 * Special thanks to Carlos Corbacho for providing various MemoryStick cards
8 * that made this driver possible.
baf8532a
AD		 9 */
10
d0be1227 11#include <linux/blk-mq.h>
baf8532a
AD		 12#include <linux/idr.h>
13#include <linux/hdreg.h>
14#include <linux/kthread.h>
59367258 15#include <linux/delay.h>
5a0e3ad6 16#include <linux/slab.h>
2a48fc0a 17#include <linux/mutex.h>
baf8532a 18#include <linux/memstick.h>
c47e7893 19#include <linux/module.h>
baf8532a
AD		 20
21#define DRIVER_NAME "mspro_block"
baf8532a
AD		 22
23static int major;
24module_param(major, int, 0644);
25
26#define MSPRO_BLOCK_MAX_SEGS 32
27#define MSPRO_BLOCK_MAX_PAGES ((2 << 16) - 1)
28
29#define MSPRO_BLOCK_SIGNATURE 0xa5c3
30#define MSPRO_BLOCK_MAX_ATTRIBUTES 41
31
8e82f8c3
AD		 32#define MSPRO_BLOCK_PART_SHIFT 3
33
baf8532a
AD		 34enum {
35 MSPRO_BLOCK_ID_SYSINFO = 0x10,
36 MSPRO_BLOCK_ID_MODELNAME = 0x15,
37 MSPRO_BLOCK_ID_MBR = 0x20,
38 MSPRO_BLOCK_ID_PBR16 = 0x21,
39 MSPRO_BLOCK_ID_PBR32 = 0x22,
40 MSPRO_BLOCK_ID_SPECFILEVALUES1 = 0x25,
41 MSPRO_BLOCK_ID_SPECFILEVALUES2 = 0x26,
42 MSPRO_BLOCK_ID_DEVINFO = 0x30
43};
44
45struct mspro_sys_attr {
46 size_t size;
47 void *data;
48 unsigned char id;
49 char name[32];
50 struct device_attribute dev_attr;
51};
52
53struct mspro_attr_entry {
69347a23
HH		 54 __be32 address;
55 __be32 size;
baf8532a
AD		 56 unsigned char id;
57 unsigned char reserved[3];
58} __attribute__((packed));
59
60struct mspro_attribute {
69347a23 61 __be16 signature;
baf8532a
AD		 62 unsigned short version;
63 unsigned char count;
64 unsigned char reserved[11];
65 struct mspro_attr_entry entries[];
66} __attribute__((packed));
67
68struct mspro_sys_info {
69 unsigned char class;
70 unsigned char reserved0;
69347a23
HH		 71 __be16 block_size;
72 __be16 block_count;
73 __be16 user_block_count;
74 __be16 page_size;
baf8532a
AD		 75 unsigned char reserved1[2];
76 unsigned char assembly_date[8];
69347a23 77 __be32 serial_number;
baf8532a
AD		 78 unsigned char assembly_maker_code;
79 unsigned char assembly_model_code[3];
69347a23
HH		 80 __be16 memory_maker_code;
81 __be16 memory_model_code;
baf8532a
AD		 82 unsigned char reserved2[4];
83 unsigned char vcc;
84 unsigned char vpp;
69347a23
HH		 85 __be16 controller_number;
86 __be16 controller_function;
87 __be16 start_sector;
88 __be16 unit_size;
baf8532a
AD		 89 unsigned char ms_sub_class;
90 unsigned char reserved3[4];
91 unsigned char interface_type;
69347a23 92 __be16 controller_code;
baf8532a
AD		 93 unsigned char format_type;
94 unsigned char reserved4;
95 unsigned char device_type;
96 unsigned char reserved5[7];
97 unsigned char mspro_id[16];
98 unsigned char reserved6[16];
99} __attribute__((packed));
100
101struct mspro_mbr {
102 unsigned char boot_partition;
103 unsigned char start_head;
104 unsigned char start_sector;
105 unsigned char start_cylinder;
106 unsigned char partition_type;
107 unsigned char end_head;
108 unsigned char end_sector;
109 unsigned char end_cylinder;
110 unsigned int start_sectors;
111 unsigned int sectors_per_partition;
112} __attribute__((packed));
113
efb2742e
AD		 114struct mspro_specfile {
115 char name[8];
116 char ext[3];
117 unsigned char attr;
118 unsigned char reserved[10];
119 unsigned short time;
120 unsigned short date;
121 unsigned short cluster;
122 unsigned int size;
123} __attribute__((packed));
124
baf8532a 125struct mspro_devinfo {
69347a23
HH		 126 __be16 cylinders;
127 __be16 heads;
128 __be16 bytes_per_track;
129 __be16 bytes_per_sector;
130 __be16 sectors_per_track;
baf8532a
AD		 131 unsigned char reserved[6];
132} __attribute__((packed));
133
134struct mspro_block_data {
135 struct memstick_dev *card;
ead70773 136 unsigned int caps;
baf8532a
AD		 137 struct gendisk *disk;
138 struct request_queue *queue;
f1d82698 139 struct request *block_req;
d0be1227 140 struct blk_mq_tag_set tag_set;
baf8532a 141 spinlock_t q_lock;
baf8532a
AD		 142
143 unsigned short page_size;
144 unsigned short cylinders;
145 unsigned short heads;
146 unsigned short sectors_per_track;
147
148 unsigned char system;
149 unsigned char read_only:1,
f1d82698 150 eject:1,
f1d82698
AD		 151 data_dir:1,
152 active:1;
baf8532a
AD		 153 unsigned char transfer_cmd;
154
155 int (*mrq_handler)(struct memstick_dev *card,
156 struct memstick_request **mrq);
157
496fc1a6
AD		 158
159 /* Default request setup function for data access method preferred by
160 * this host instance.
161 */
162 void (*setup_transfer)(struct memstick_dev *card,
163 u64 offset, size_t length);
164
baf8532a
AD		 165 struct attribute_group attr_group;
166
167 struct scatterlist req_sg[MSPRO_BLOCK_MAX_SEGS];
168 unsigned int seg_count;
169 unsigned int current_seg;
f1d82698 170 unsigned int current_page;
baf8532a
AD		 171};
172
173static DEFINE_IDR(mspro_block_disk_idr);
174static DEFINE_MUTEX(mspro_block_disk_lock);
175
f1d82698
AD		 176static int mspro_block_complete_req(struct memstick_dev *card, int error);
177
baf8532a
AD		 178/*** Block device ***/
179
185ed423 180static void mspro_block_bd_free_disk(struct gendisk *disk)
baf8532a
AD		 181{
182 struct mspro_block_data *msb = disk->private_data;
f331c029 183 int disk_id = MINOR(disk_devt(disk)) >> MSPRO_BLOCK_PART_SHIFT;
baf8532a
AD		 184
185 mutex_lock(&mspro_block_disk_lock);
185ed423 186 idr_remove(&mspro_block_disk_idr, disk_id);
baf8532a 187 mutex_unlock(&mspro_block_disk_lock);
baf8532a 188
185ed423 189 kfree(msb);
baf8532a
AD		 190}
191
192static int mspro_block_bd_getgeo(struct block_device *bdev,
193 struct hd_geometry *geo)
194{
195 struct mspro_block_data *msb = bdev->bd_disk->private_data;
196
197 geo->heads = msb->heads;
198 geo->sectors = msb->sectors_per_track;
199 geo->cylinders = msb->cylinders;
200
201 return 0;
202}
203
83d5cde4 204static const struct block_device_operations ms_block_bdops = {
185ed423
CH		 205 .owner = THIS_MODULE,
206 .getgeo = mspro_block_bd_getgeo,
207 .free_disk = mspro_block_bd_free_disk,
baf8532a
AD		 208};
209
210/*** Information ***/
211
212static struct mspro_sys_attr *mspro_from_sysfs_attr(struct attribute *attr)
213{
214 struct device_attribute *dev_attr
215 = container_of(attr, struct device_attribute, attr);
216 return container_of(dev_attr, struct mspro_sys_attr, dev_attr);
217}
218
219static const char *mspro_block_attr_name(unsigned char tag)
220{
221 switch (tag) {
222 case MSPRO_BLOCK_ID_SYSINFO:
223 return "attr_sysinfo";
224 case MSPRO_BLOCK_ID_MODELNAME:
225 return "attr_modelname";
226 case MSPRO_BLOCK_ID_MBR:
227 return "attr_mbr";
228 case MSPRO_BLOCK_ID_PBR16:
229 return "attr_pbr16";
230 case MSPRO_BLOCK_ID_PBR32:
231 return "attr_pbr32";
232 case MSPRO_BLOCK_ID_SPECFILEVALUES1:
233 return "attr_specfilevalues1";
234 case MSPRO_BLOCK_ID_SPECFILEVALUES2:
235 return "attr_specfilevalues2";
236 case MSPRO_BLOCK_ID_DEVINFO:
237 return "attr_devinfo";
238 default:
239 return NULL;
8c3c0aca 240 }
baf8532a
AD		 241}
242
243typedef ssize_t (*sysfs_show_t)(struct device *dev,
244 struct device_attribute *attr,
245 char *buffer);
246
247static ssize_t mspro_block_attr_show_default(struct device *dev,
248 struct device_attribute *attr,
249 char *buffer)
250{
251 struct mspro_sys_attr *s_attr = container_of(attr,
252 struct mspro_sys_attr,
253 dev_attr);
254
255 ssize_t cnt, rc = 0;
256
257 for (cnt = 0; cnt < s_attr->size; cnt++) {
258 if (cnt && !(cnt % 16)) {
259 if (PAGE_SIZE - rc)
260 buffer[rc++] = '\n';
261 }
262
263 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "%02x ",
264 ((unsigned char *)s_attr->data)[cnt]);
265 }
266 return rc;
267}
268
269static ssize_t mspro_block_attr_show_sysinfo(struct device *dev,
270 struct device_attribute *attr,
271 char *buffer)
272{
273 struct mspro_sys_attr *x_attr = container_of(attr,
274 struct mspro_sys_attr,
275 dev_attr);
276 struct mspro_sys_info *x_sys = x_attr->data;
277 ssize_t rc = 0;
251cc9b9
AD		 278 int date_tz = 0, date_tz_f = 0;
279
280 if (x_sys->assembly_date[0] > 0x80U) {
281 date_tz = (~x_sys->assembly_date[0]) + 1;
282 date_tz_f = date_tz & 3;
283 date_tz >>= 2;
284 date_tz = -date_tz;
285 date_tz_f *= 15;
286 } else if (x_sys->assembly_date[0] < 0x80U) {
287 date_tz = x_sys->assembly_date[0];
288 date_tz_f = date_tz & 3;
289 date_tz >>= 2;
290 date_tz_f *= 15;
291 }
baf8532a
AD		 292
293 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "class: %x\n",
294 x_sys->class);
295 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "block size: %x\n",
296 be16_to_cpu(x_sys->block_size));
297 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "block count: %x\n",
298 be16_to_cpu(x_sys->block_count));
299 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "user block count: %x\n",
300 be16_to_cpu(x_sys->user_block_count));
301 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "page size: %x\n",
302 be16_to_cpu(x_sys->page_size));
303 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "assembly date: "
251cc9b9
AD		 304 "GMT%+d:%d %04u-%02u-%02u %02u:%02u:%02u\n",
305 date_tz, date_tz_f,
69347a23 306 be16_to_cpup((__be16 *)&x_sys->assembly_date[1]),
baf8532a
AD		 307 x_sys->assembly_date[3], x_sys->assembly_date[4],
308 x_sys->assembly_date[5], x_sys->assembly_date[6],
309 x_sys->assembly_date[7]);
310 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "serial number: %x\n",
311 be32_to_cpu(x_sys->serial_number));
312 rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
313 "assembly maker code: %x\n",
314 x_sys->assembly_maker_code);
315 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "assembly model code: "
316 "%02x%02x%02x\n", x_sys->assembly_model_code[0],
317 x_sys->assembly_model_code[1],
318 x_sys->assembly_model_code[2]);
319 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "memory maker code: %x\n",
320 be16_to_cpu(x_sys->memory_maker_code));
321 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "memory model code: %x\n",
322 be16_to_cpu(x_sys->memory_model_code));
323 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "vcc: %x\n",
324 x_sys->vcc);
325 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "vpp: %x\n",
326 x_sys->vpp);
327 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "controller number: %x\n",
328 be16_to_cpu(x_sys->controller_number));
329 rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
330 "controller function: %x\n",
331 be16_to_cpu(x_sys->controller_function));
332 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sector: %x\n",
333 be16_to_cpu(x_sys->start_sector));
334 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "unit size: %x\n",
335 be16_to_cpu(x_sys->unit_size));
336 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "sub class: %x\n",
337 x_sys->ms_sub_class);
338 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "interface type: %x\n",
339 x_sys->interface_type);
340 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "controller code: %x\n",
341 be16_to_cpu(x_sys->controller_code));
342 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "format type: %x\n",
343 x_sys->format_type);
344 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "device type: %x\n",
345 x_sys->device_type);
346 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "mspro id: %s\n",
347 x_sys->mspro_id);
348 return rc;
349}
350
351static ssize_t mspro_block_attr_show_modelname(struct device *dev,
352 struct device_attribute *attr,
353 char *buffer)
354{
355 struct mspro_sys_attr *s_attr = container_of(attr,
356 struct mspro_sys_attr,
357 dev_attr);
358
359 return scnprintf(buffer, PAGE_SIZE, "%s", (char *)s_attr->data);
360}
361
362static ssize_t mspro_block_attr_show_mbr(struct device *dev,
363 struct device_attribute *attr,
364 char *buffer)
365{
366 struct mspro_sys_attr *x_attr = container_of(attr,
367 struct mspro_sys_attr,
368 dev_attr);
369 struct mspro_mbr *x_mbr = x_attr->data;
370 ssize_t rc = 0;
371
372 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "boot partition: %x\n",
373 x_mbr->boot_partition);
374 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start head: %x\n",
375 x_mbr->start_head);
376 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sector: %x\n",
377 x_mbr->start_sector);
378 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start cylinder: %x\n",
379 x_mbr->start_cylinder);
380 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "partition type: %x\n",
381 x_mbr->partition_type);
382 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end head: %x\n",
383 x_mbr->end_head);
384 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end sector: %x\n",
385 x_mbr->end_sector);
386 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end cylinder: %x\n",
387 x_mbr->end_cylinder);
388 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sectors: %x\n",
389 x_mbr->start_sectors);
390 rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
391 "sectors per partition: %x\n",
392 x_mbr->sectors_per_partition);
393 return rc;
394}
395
efb2742e
AD		 396static ssize_t mspro_block_attr_show_specfile(struct device *dev,
397 struct device_attribute *attr,
398 char *buffer)
399{
400 struct mspro_sys_attr *x_attr = container_of(attr,
401 struct mspro_sys_attr,
402 dev_attr);
403 struct mspro_specfile *x_spfile = x_attr->data;
404 char name[9], ext[4];
405 ssize_t rc = 0;
406
407 memcpy(name, x_spfile->name, 8);
408 name[8] = 0;
409 memcpy(ext, x_spfile->ext, 3);
410 ext[3] = 0;
411
412 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "name: %s\n", name);
413 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "ext: %s\n", ext);
414 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "attribute: %x\n",
415 x_spfile->attr);
416 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "time: %d:%d:%d\n",
417 x_spfile->time >> 11,
418 (x_spfile->time >> 5) & 0x3f,
419 (x_spfile->time & 0x1f) * 2);
420 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "date: %d-%d-%d\n",
421 (x_spfile->date >> 9) + 1980,
422 (x_spfile->date >> 5) & 0xf,
423 x_spfile->date & 0x1f);
424 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start cluster: %x\n",
425 x_spfile->cluster);
426 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "size: %x\n",
427 x_spfile->size);
428 return rc;
429}
430
baf8532a
AD		 431static ssize_t mspro_block_attr_show_devinfo(struct device *dev,
432 struct device_attribute *attr,
433 char *buffer)
434{
435 struct mspro_sys_attr *x_attr = container_of(attr,
436 struct mspro_sys_attr,
437 dev_attr);
438 struct mspro_devinfo *x_devinfo = x_attr->data;
439 ssize_t rc = 0;
440
441 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "cylinders: %x\n",
442 be16_to_cpu(x_devinfo->cylinders));
443 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "heads: %x\n",
444 be16_to_cpu(x_devinfo->heads));
445 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "bytes per track: %x\n",
446 be16_to_cpu(x_devinfo->bytes_per_track));
447 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "bytes per sector: %x\n",
448 be16_to_cpu(x_devinfo->bytes_per_sector));
449 rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "sectors per track: %x\n",
450 be16_to_cpu(x_devinfo->sectors_per_track));
451 return rc;
452}
453
454static sysfs_show_t mspro_block_attr_show(unsigned char tag)
455{
456 switch (tag) {
457 case MSPRO_BLOCK_ID_SYSINFO:
458 return mspro_block_attr_show_sysinfo;
459 case MSPRO_BLOCK_ID_MODELNAME:
460 return mspro_block_attr_show_modelname;
461 case MSPRO_BLOCK_ID_MBR:
462 return mspro_block_attr_show_mbr;
efb2742e
AD		 463 case MSPRO_BLOCK_ID_SPECFILEVALUES1:
464 case MSPRO_BLOCK_ID_SPECFILEVALUES2:
465 return mspro_block_attr_show_specfile;
baf8532a
AD		 466 case MSPRO_BLOCK_ID_DEVINFO:
467 return mspro_block_attr_show_devinfo;
468 default:
469 return mspro_block_attr_show_default;
470 }
471}
472
473/*** Protocol handlers ***/
474
475/*
476 * Functions prefixed with "h_" are protocol callbacks. They can be called from
477 * interrupt context. Return value of 0 means that request processing is still
478 * ongoing, while special error value of -EAGAIN means that current request is
479 * finished (and request processor should come back some time later).
480 */
481
482static int h_mspro_block_req_init(struct memstick_dev *card,
483 struct memstick_request **mrq)
484{
485 struct mspro_block_data *msb = memstick_get_drvdata(card);
486
487 *mrq = &card->current_mrq;
488 card->next_request = msb->mrq_handler;
489 return 0;
490}
491
492static int h_mspro_block_default(struct memstick_dev *card,
493 struct memstick_request **mrq)
494{
f1d82698
AD		 495 return mspro_block_complete_req(card, (*mrq)->error);
496}
497
498static int h_mspro_block_default_bad(struct memstick_dev *card,
499 struct memstick_request **mrq)
500{
501 return -ENXIO;
baf8532a
AD		 502}
503
504static int h_mspro_block_get_ro(struct memstick_dev *card,
505 struct memstick_request **mrq)
506{
507 struct mspro_block_data *msb = memstick_get_drvdata(card);
508
f1d82698
AD		 509 if (!(*mrq)->error) {
510 if ((*mrq)->data[offsetof(struct ms_status_register, status0)]
511 & MEMSTICK_STATUS0_WP)
512 msb->read_only = 1;
513 else
514 msb->read_only = 0;
baf8532a
AD		 515 }
516
f1d82698 517 return mspro_block_complete_req(card, (*mrq)->error);
baf8532a
AD		 518}
519
520static int h_mspro_block_wait_for_ced(struct memstick_dev *card,
521 struct memstick_request **mrq)
522{
baf8532a
AD		 523 dev_dbg(&card->dev, "wait for ced: value %x\n", (*mrq)->data[0]);
524
f1d82698
AD		 525 if (!(*mrq)->error) {
526 if ((*mrq)->data[0] & (MEMSTICK_INT_CMDNAK | MEMSTICK_INT_ERR))
527 (*mrq)->error = -EFAULT;
528 else if (!((*mrq)->data[0] & MEMSTICK_INT_CED))
529 return 0;
baf8532a
AD		 530 }
531
f1d82698 532 return mspro_block_complete_req(card, (*mrq)->error);
baf8532a
AD		 533}
534
535static int h_mspro_block_transfer_data(struct memstick_dev *card,
536 struct memstick_request **mrq)
537{
baf8532a
AD		 538 struct mspro_block_data *msb = memstick_get_drvdata(card);
539 unsigned char t_val = 0;
540 struct scatterlist t_sg = { 0 };
541 size_t t_offset;
542
f1d82698
AD		 543 if ((*mrq)->error)
544 return mspro_block_complete_req(card, (*mrq)->error);
baf8532a
AD		 545
546 switch ((*mrq)->tpc) {
547 case MS_TPC_WRITE_REG:
548 memstick_init_req(*mrq, MS_TPC_SET_CMD, &msb->transfer_cmd, 1);
ead70773 549 (*mrq)->need_card_int = 1;
baf8532a
AD		 550 return 0;
551 case MS_TPC_SET_CMD:
552 t_val = (*mrq)->int_reg;
553 memstick_init_req(*mrq, MS_TPC_GET_INT, NULL, 1);
ead70773 554 if (msb->caps & MEMSTICK_CAP_AUTO_GET_INT)
baf8532a
AD		 555 goto has_int_reg;
556 return 0;
557 case MS_TPC_GET_INT:
558 t_val = (*mrq)->data[0];
559has_int_reg:
560 if (t_val & (MEMSTICK_INT_CMDNAK | MEMSTICK_INT_ERR)) {
561 t_val = MSPRO_CMD_STOP;
562 memstick_init_req(*mrq, MS_TPC_SET_CMD, &t_val, 1);
563 card->next_request = h_mspro_block_default;
564 return 0;
565 }
566
567 if (msb->current_page
568 == (msb->req_sg[msb->current_seg].length
569 / msb->page_size)) {
570 msb->current_page = 0;
571 msb->current_seg++;
572
573 if (msb->current_seg == msb->seg_count) {
574 if (t_val & MEMSTICK_INT_CED) {
f1d82698
AD		 575 return mspro_block_complete_req(card,
576 0);
baf8532a
AD		 577 } else {
578 card->next_request
579 = h_mspro_block_wait_for_ced;
580 memstick_init_req(*mrq, MS_TPC_GET_INT,
581 NULL, 1);
582 return 0;
583 }
584 }
585 }
586
587 if (!(t_val & MEMSTICK_INT_BREQ)) {
588 memstick_init_req(*mrq, MS_TPC_GET_INT, NULL, 1);
589 return 0;
590 }
591
592 t_offset = msb->req_sg[msb->current_seg].offset;
593 t_offset += msb->current_page * msb->page_size;
594
595 sg_set_page(&t_sg,
596 nth_page(sg_page(&(msb->req_sg[msb->current_seg])),
597 t_offset >> PAGE_SHIFT),
598 msb->page_size, offset_in_page(t_offset));
599
600 memstick_init_req_sg(*mrq, msb->data_dir == READ
601 ? MS_TPC_READ_LONG_DATA
602 : MS_TPC_WRITE_LONG_DATA,
603 &t_sg);
ead70773 604 (*mrq)->need_card_int = 1;
baf8532a
AD		 605 return 0;
606 case MS_TPC_READ_LONG_DATA:
607 case MS_TPC_WRITE_LONG_DATA:
608 msb->current_page++;
ead70773 609 if (msb->caps & MEMSTICK_CAP_AUTO_GET_INT) {
baf8532a
AD		 610 t_val = (*mrq)->int_reg;
611 goto has_int_reg;
612 } else {
613 memstick_init_req(*mrq, MS_TPC_GET_INT, NULL, 1);
614 return 0;
615 }
616
617 default:
618 BUG();
619 }
620}
621
496fc1a6
AD		 622/*** Transfer setup functions for different access methods. ***/
623
624/** Setup data transfer request for SET_CMD TPC with arguments in card
625 * registers.
626 *
627 * @card Current media instance
628 * @offset Target data offset in bytes
629 * @length Required transfer length in bytes.
630 */
631static void h_mspro_block_setup_cmd(struct memstick_dev *card, u64 offset,
632 size_t length)
633{
634 struct mspro_block_data *msb = memstick_get_drvdata(card);
635 struct mspro_param_register param = {
636 .system = msb->system,
637 .data_count = cpu_to_be16((uint16_t)(length / msb->page_size)),
638 /* ISO C90 warning precludes direct initialization for now. */
639 .data_address = 0,
640 .tpc_param = 0
641 };
642
643 do_div(offset, msb->page_size);
644 param.data_address = cpu_to_be32((uint32_t)offset);
645
646 card->next_request = h_mspro_block_req_init;
647 msb->mrq_handler = h_mspro_block_transfer_data;
648 memstick_init_req(&card->current_mrq, MS_TPC_WRITE_REG,
649 &param, sizeof(param));
650}
651
baf8532a
AD		 652/*** Data transfer ***/
653
61009f82 654static int mspro_block_issue_req(struct memstick_dev *card)
baf8532a
AD		 655{
656 struct mspro_block_data *msb = memstick_get_drvdata(card);
496fc1a6 657 u64 t_off;
f1d82698 658 unsigned int count;
baf8532a 659
61009f82 660 while (true) {
f1d82698 661 msb->current_page = 0;
baf8532a 662 msb->current_seg = 0;
f1d82698
AD		 663 msb->seg_count = blk_rq_map_sg(msb->block_req->q,
664 msb->block_req,
665 msb->req_sg);
baf8532a 666
f1d82698 667 if (!msb->seg_count) {
d0be1227 668 unsigned int bytes = blk_rq_cur_bytes(msb->block_req);
61009f82 669 bool chunk;
d0be1227
JA		 670
671 chunk = blk_update_request(msb->block_req,
672 BLK_STS_RESOURCE,
673 bytes);
674 if (chunk)
675 continue;
676 __blk_mq_end_request(msb->block_req,
677 BLK_STS_RESOURCE);
678 msb->block_req = NULL;
61009f82 679 return -EAGAIN;
f1d82698 680 }
baf8532a 681
496fc1a6
AD		 682 t_off = blk_rq_pos(msb->block_req);
683 t_off <<= 9;
1011c1b9 684 count = blk_rq_bytes(msb->block_req);
baf8532a 685
496fc1a6 686 msb->setup_transfer(card, t_off, count);
f1d82698
AD		 687
688 msb->data_dir = rq_data_dir(msb->block_req);
689 msb->transfer_cmd = msb->data_dir == READ
690 ? MSPRO_CMD_READ_DATA
691 : MSPRO_CMD_WRITE_DATA;
692
f1d82698
AD		 693 memstick_new_req(card->host);
694 return 0;
695 }
baf8532a
AD		 696}
697
f1d82698 698static int mspro_block_complete_req(struct memstick_dev *card, int error)
baf8532a 699{
f1d82698 700 struct mspro_block_data *msb = memstick_get_drvdata(card);
d0be1227
JA		 701 int cnt;
702 bool chunk;
f1d82698 703 unsigned int t_len = 0;
baf8532a
AD		 704 unsigned long flags;
705
706 spin_lock_irqsave(&msb->q_lock, flags);
d0be1227 707 dev_dbg(&card->dev, "complete %d, %d\n", msb->block_req ? 1 : 0,
f1d82698
AD		 708 error);
709
d0be1227 710 if (msb->block_req) {
f1d82698
AD		 711 /* Nothing to do - not really an error */
712 if (error == -EAGAIN)
713 error = 0;
714
715 if (error || (card->current_mrq.tpc == MSPRO_CMD_STOP)) {
716 if (msb->data_dir == READ) {
13f6b191 717 for (cnt = 0; cnt < msb->current_seg; cnt++) {
f1d82698
AD		 718 t_len += msb->req_sg[cnt].length
719 / msb->page_size;
720
721 if (msb->current_page)
722 t_len += msb->current_page - 1;
723
724 t_len *= msb->page_size;
13f6b191 725 }
f1d82698
AD		 726 }
727 } else
1011c1b9 728 t_len = blk_rq_bytes(msb->block_req);
f1d82698
AD		 729
730 dev_dbg(&card->dev, "transferred %x (%d)\n", t_len, error);
731
732 if (error && !t_len)
733 t_len = blk_rq_cur_bytes(msb->block_req);
734
d0be1227 735 chunk = blk_update_request(msb->block_req,
2a842aca 736 errno_to_blk_status(error), t_len);
d0be1227 737 if (chunk) {
61009f82 738 error = mspro_block_issue_req(card);
d0be1227
JA		 739 if (!error)
740 goto out;
741 } else {
742 __blk_mq_end_request(msb->block_req,
743 errno_to_blk_status(error));
744 msb->block_req = NULL;
745 }
f1d82698
AD		 746 } else {
747 if (!error)
748 error = -EAGAIN;
749 }
750
751 card->next_request = h_mspro_block_default_bad;
752 complete_all(&card->mrq_complete);
753out:
baf8532a 754 spin_unlock_irqrestore(&msb->q_lock, flags);
f1d82698 755 return error;
baf8532a
AD		 756}
757
17017d8d
AD		 758static void mspro_block_stop(struct memstick_dev *card)
759{
760 struct mspro_block_data *msb = memstick_get_drvdata(card);
761 int rc = 0;
762 unsigned long flags;
763
764 while (1) {
765 spin_lock_irqsave(&msb->q_lock, flags);
d0be1227
JA		 766 if (!msb->block_req) {
767 blk_mq_stop_hw_queues(msb->queue);
17017d8d
AD		 768 rc = 1;
769 }
770 spin_unlock_irqrestore(&msb->q_lock, flags);
771
772 if (rc)
773 break;
774
775 wait_for_completion(&card->mrq_complete);
776 }
777}
778
779static void mspro_block_start(struct memstick_dev *card)
780{
781 struct mspro_block_data *msb = memstick_get_drvdata(card);
17017d8d 782
d0be1227 783 blk_mq_start_hw_queues(msb->queue);
17017d8d
AD		 784}
785
d0be1227
JA		 786static blk_status_t mspro_queue_rq(struct blk_mq_hw_ctx *hctx,
787 const struct blk_mq_queue_data *bd)
baf8532a 788{
d0be1227 789 struct memstick_dev *card = hctx->queue->queuedata;
baf8532a 790 struct mspro_block_data *msb = memstick_get_drvdata(card);
baf8532a 791
d0be1227 792 spin_lock_irq(&msb->q_lock);
f1d82698 793
d0be1227
JA		 794 if (msb->block_req) {
795 spin_unlock_irq(&msb->q_lock);
796 return BLK_STS_DEV_RESOURCE;
797 }
f1d82698 798
d0be1227
JA		 799 if (msb->eject) {
800 spin_unlock_irq(&msb->q_lock);
801 blk_mq_start_request(bd->rq);
802 return BLK_STS_IOERR;
baf8532a 803 }
f1d82698 804
d0be1227
JA		 805 msb->block_req = bd->rq;
806 blk_mq_start_request(bd->rq);
807
61009f82 808 if (mspro_block_issue_req(card))
d0be1227
JA		 809 msb->block_req = NULL;
810
811 spin_unlock_irq(&msb->q_lock);
812 return BLK_STS_OK;
baf8532a
AD		 813}
814
815/*** Initialization ***/
816
817static int mspro_block_wait_for_ced(struct memstick_dev *card)
818{
819 struct mspro_block_data *msb = memstick_get_drvdata(card);
820
821 card->next_request = h_mspro_block_req_init;
822 msb->mrq_handler = h_mspro_block_wait_for_ced;
823 memstick_init_req(&card->current_mrq, MS_TPC_GET_INT, NULL, 1);
824 memstick_new_req(card->host);
825 wait_for_completion(&card->mrq_complete);
826 return card->current_mrq.error;
827}
828
962ee1b1
AD		 829static int mspro_block_set_interface(struct memstick_dev *card,
830 unsigned char sys_reg)
baf8532a
AD		 831{
832 struct memstick_host *host = card->host;
833 struct mspro_block_data *msb = memstick_get_drvdata(card);
834 struct mspro_param_register param = {
962ee1b1 835 .system = sys_reg,
baf8532a
AD		 836 .data_count = 0,
837 .data_address = 0,
e1f19995 838 .tpc_param = 0
baf8532a
AD		 839 };
840
841 card->next_request = h_mspro_block_req_init;
842 msb->mrq_handler = h_mspro_block_default;
843 memstick_init_req(&card->current_mrq, MS_TPC_WRITE_REG, &param,
844 sizeof(param));
845 memstick_new_req(host);
846 wait_for_completion(&card->mrq_complete);
962ee1b1
AD		 847 return card->current_mrq.error;
848}
849
850static int mspro_block_switch_interface(struct memstick_dev *card)
851{
852 struct memstick_host *host = card->host;
853 struct mspro_block_data *msb = memstick_get_drvdata(card);
854 int rc = 0;
855
8e82f8c3 856try_again:
962ee1b1
AD		 857 if (msb->caps & MEMSTICK_CAP_PAR4)
858 rc = mspro_block_set_interface(card, MEMSTICK_SYS_PAR4);
859 else
860 return 0;
861
862 if (rc) {
863 printk(KERN_WARNING
864 "%s: could not switch to 4-bit mode, error %d\n",
0252c3b4 865 dev_name(&card->dev), rc);
962ee1b1
AD		 866 return 0;
867 }
baf8532a 868
e1f19995
AD		 869 msb->system = MEMSTICK_SYS_PAR4;
870 host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_PAR4);
962ee1b1 871 printk(KERN_INFO "%s: switching to 4-bit parallel mode\n",
0252c3b4 872 dev_name(&card->dev));
962ee1b1
AD		 873
874 if (msb->caps & MEMSTICK_CAP_PAR8) {
875 rc = mspro_block_set_interface(card, MEMSTICK_SYS_PAR8);
876
877 if (!rc) {
878 msb->system = MEMSTICK_SYS_PAR8;
879 host->set_param(host, MEMSTICK_INTERFACE,
880 MEMSTICK_PAR8);
881 printk(KERN_INFO
882 "%s: switching to 8-bit parallel mode\n",
0252c3b4 883 dev_name(&card->dev));
962ee1b1
AD		 884 } else
885 printk(KERN_WARNING
886 "%s: could not switch to 8-bit mode, error %d\n",
0252c3b4 887 dev_name(&card->dev), rc);
962ee1b1 888 }
baf8532a
AD		 889
890 card->next_request = h_mspro_block_req_init;
891 msb->mrq_handler = h_mspro_block_default;
892 memstick_init_req(&card->current_mrq, MS_TPC_GET_INT, NULL, 1);
893 memstick_new_req(card->host);
894 wait_for_completion(&card->mrq_complete);
962ee1b1 895 rc = card->current_mrq.error;
baf8532a 896
962ee1b1
AD		 897 if (rc) {
898 printk(KERN_WARNING
899 "%s: interface error, trying to fall back to serial\n",
0252c3b4 900 dev_name(&card->dev));
59367258
AD		 901 msb->system = MEMSTICK_SYS_SERIAL;
902 host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_OFF);
962ee1b1 903 msleep(10);
59367258 904 host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_ON);
baf8532a 905 host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_SERIAL);
59367258 906
962ee1b1
AD		 907 rc = memstick_set_rw_addr(card);
908 if (!rc)
909 rc = mspro_block_set_interface(card, msb->system);
8e82f8c3
AD		 910
911 if (!rc) {
912 msleep(150);
913 rc = mspro_block_wait_for_ced(card);
914 if (rc)
915 return rc;
916
917 if (msb->caps & MEMSTICK_CAP_PAR8) {
918 msb->caps &= ~MEMSTICK_CAP_PAR8;
919 goto try_again;
920 }
921 }
baf8532a 922 }
962ee1b1 923 return rc;
baf8532a
AD		 924}
925
926/* Memory allocated for attributes by this function should be freed by
25985edc 927 * mspro_block_data_clear, no matter if the initialization process succeeded
baf8532a
AD		 928 * or failed.
929 */
930static int mspro_block_read_attributes(struct memstick_dev *card)
931{
932 struct mspro_block_data *msb = memstick_get_drvdata(card);
baf8532a
AD		 933 struct mspro_attribute *attr = NULL;
934 struct mspro_sys_attr *s_attr = NULL;
935 unsigned char *buffer = NULL;
936 int cnt, rc, attr_count;
496fc1a6
AD		 937 /* While normally physical device offsets, represented here by
938 * attr_offset and attr_len will be of large numeric types, we can be
939 * sure, that attributes are close enough to the beginning of the
940 * device, to save ourselves some trouble.
941 */
942 unsigned int addr, attr_offset = 0, attr_len = msb->page_size;
baf8532a
AD		 943
944 attr = kmalloc(msb->page_size, GFP_KERNEL);
945 if (!attr)
946 return -ENOMEM;
947
948 sg_init_one(&msb->req_sg[0], attr, msb->page_size);
949 msb->seg_count = 1;
950 msb->current_seg = 0;
951 msb->current_page = 0;
952 msb->data_dir = READ;
953 msb->transfer_cmd = MSPRO_CMD_READ_ATRB;
954
496fc1a6
AD		 955 msb->setup_transfer(card, attr_offset, attr_len);
956
baf8532a
AD		 957 memstick_new_req(card->host);
958 wait_for_completion(&card->mrq_complete);
959 if (card->current_mrq.error) {
960 rc = card->current_mrq.error;
961 goto out_free_attr;
962 }
963
964 if (be16_to_cpu(attr->signature) != MSPRO_BLOCK_SIGNATURE) {
965 printk(KERN_ERR "%s: unrecognized device signature %x\n",
0252c3b4 966 dev_name(&card->dev), be16_to_cpu(attr->signature));
baf8532a
AD		 967 rc = -ENODEV;
968 goto out_free_attr;
969 }
970
971 if (attr->count > MSPRO_BLOCK_MAX_ATTRIBUTES) {
972 printk(KERN_WARNING "%s: way too many attribute entries\n",
0252c3b4 973 dev_name(&card->dev));
baf8532a
AD		 974 attr_count = MSPRO_BLOCK_MAX_ATTRIBUTES;
975 } else
976 attr_count = attr->count;
977
be2d3f97
MN		 978 msb->attr_group.attrs = kcalloc(attr_count + 1,
979 sizeof(*msb->attr_group.attrs),
baf8532a
AD		 980 GFP_KERNEL);
981 if (!msb->attr_group.attrs) {
982 rc = -ENOMEM;
983 goto out_free_attr;
984 }
985 msb->attr_group.name = "media_attributes";
986
de6cdcb5 987 buffer = kmemdup(attr, attr_len, GFP_KERNEL);
baf8532a
AD		 988 if (!buffer) {
989 rc = -ENOMEM;
990 goto out_free_attr;
991 }
baf8532a
AD		 992
993 for (cnt = 0; cnt < attr_count; ++cnt) {
994 s_attr = kzalloc(sizeof(struct mspro_sys_attr), GFP_KERNEL);
995 if (!s_attr) {
996 rc = -ENOMEM;
997 goto out_free_buffer;
998 }
999
1000 msb->attr_group.attrs[cnt] = &s_attr->dev_attr.attr;
1001 addr = be32_to_cpu(attr->entries[cnt].address);
496fc1a6 1002 s_attr->size = be32_to_cpu(attr->entries[cnt].size);
baf8532a 1003 dev_dbg(&card->dev, "adding attribute %d: id %x, address %x, "
496fc1a6
AD		 1004 "size %zx\n", cnt, attr->entries[cnt].id, addr,
1005 s_attr->size);
baf8532a
AD		 1006 s_attr->id = attr->entries[cnt].id;
1007 if (mspro_block_attr_name(s_attr->id))
1008 snprintf(s_attr->name, sizeof(s_attr->name), "%s",
1009 mspro_block_attr_name(attr->entries[cnt].id));
1010 else
1011 snprintf(s_attr->name, sizeof(s_attr->name),
1012 "attr_x%02x", attr->entries[cnt].id);
1013
21fd0495 1014 sysfs_attr_init(&s_attr->dev_attr.attr);
baf8532a
AD		 1015 s_attr->dev_attr.attr.name = s_attr->name;
1016 s_attr->dev_attr.attr.mode = S_IRUGO;
baf8532a
AD		 1017 s_attr->dev_attr.show = mspro_block_attr_show(s_attr->id);
1018
496fc1a6 1019 if (!s_attr->size)
baf8532a
AD		 1020 continue;
1021
496fc1a6 1022 s_attr->data = kmalloc(s_attr->size, GFP_KERNEL);
baf8532a
AD		 1023 if (!s_attr->data) {
1024 rc = -ENOMEM;
1025 goto out_free_buffer;
1026 }
1027
496fc1a6
AD		 1028 if (((addr / msb->page_size) == (attr_offset / msb->page_size))
1029 && (((addr + s_attr->size - 1) / msb->page_size)
1030 == (attr_offset / msb->page_size))) {
baf8532a 1031 memcpy(s_attr->data, buffer + addr % msb->page_size,
496fc1a6 1032 s_attr->size);
baf8532a
AD		 1033 continue;
1034 }
1035
496fc1a6
AD		 1036 attr_offset = (addr / msb->page_size) * msb->page_size;
1037
1038 if ((attr_offset + attr_len) < (addr + s_attr->size)) {
baf8532a 1039 kfree(buffer);
496fc1a6
AD		 1040 attr_len = (((addr + s_attr->size) / msb->page_size)
1041 + 1 ) * msb->page_size - attr_offset;
1042 buffer = kmalloc(attr_len, GFP_KERNEL);
baf8532a
AD		 1043 if (!buffer) {
1044 rc = -ENOMEM;
1045 goto out_free_attr;
1046 }
1047 }
1048
496fc1a6 1049 sg_init_one(&msb->req_sg[0], buffer, attr_len);
baf8532a
AD		 1050 msb->seg_count = 1;
1051 msb->current_seg = 0;
1052 msb->current_page = 0;
1053 msb->data_dir = READ;
1054 msb->transfer_cmd = MSPRO_CMD_READ_ATRB;
1055
496fc1a6
AD		 1056 dev_dbg(&card->dev, "reading attribute range %x, %x\n",
1057 attr_offset, attr_len);
baf8532a 1058
496fc1a6 1059 msb->setup_transfer(card, attr_offset, attr_len);
baf8532a
AD		 1060 memstick_new_req(card->host);
1061 wait_for_completion(&card->mrq_complete);
1062 if (card->current_mrq.error) {
1063 rc = card->current_mrq.error;
1064 goto out_free_buffer;
1065 }
1066
496fc1a6
AD		 1067 memcpy(s_attr->data, buffer + addr % msb->page_size,
1068 s_attr->size);
baf8532a
AD		 1069 }
1070
1071 rc = 0;
1072out_free_buffer:
1073 kfree(buffer);
1074out_free_attr:
1075 kfree(attr);
1076 return rc;
1077}
1078
1079static int mspro_block_init_card(struct memstick_dev *card)
1080{
1081 struct mspro_block_data *msb = memstick_get_drvdata(card);
1082 struct memstick_host *host = card->host;
1083 int rc = 0;
1084
e1f19995 1085 msb->system = MEMSTICK_SYS_SERIAL;
496fc1a6
AD		 1086 msb->setup_transfer = h_mspro_block_setup_cmd;
1087
baf8532a
AD		 1088 card->reg_addr.r_offset = offsetof(struct mspro_register, status);
1089 card->reg_addr.r_length = sizeof(struct ms_status_register);
1090 card->reg_addr.w_offset = offsetof(struct mspro_register, param);
1091 card->reg_addr.w_length = sizeof(struct mspro_param_register);
1092
1093 if (memstick_set_rw_addr(card))
1094 return -EIO;
1095
ead70773 1096 msb->caps = host->caps;
8e82f8c3
AD		 1097
1098 msleep(150);
1099 rc = mspro_block_wait_for_ced(card);
962ee1b1
AD		 1100 if (rc)
1101 return rc;
baf8532a 1102
8e82f8c3 1103 rc = mspro_block_switch_interface(card);
baf8532a
AD		 1104 if (rc)
1105 return rc;
8e82f8c3 1106
baf8532a 1107 dev_dbg(&card->dev, "card activated\n");
ead70773
AD		 1108 if (msb->system != MEMSTICK_SYS_SERIAL)
1109 msb->caps |= MEMSTICK_CAP_AUTO_GET_INT;
baf8532a
AD		 1110
1111 card->next_request = h_mspro_block_req_init;
1112 msb->mrq_handler = h_mspro_block_get_ro;
1113 memstick_init_req(&card->current_mrq, MS_TPC_READ_REG, NULL,
1114 sizeof(struct ms_status_register));
1115 memstick_new_req(card->host);
1116 wait_for_completion(&card->mrq_complete);
1117 if (card->current_mrq.error)
1118 return card->current_mrq.error;
1119
1120 dev_dbg(&card->dev, "card r/w status %d\n", msb->read_only ? 0 : 1);
1121
1122 msb->page_size = 512;
1123 rc = mspro_block_read_attributes(card);
1124 if (rc)
1125 return rc;
1126
1127 dev_dbg(&card->dev, "attributes loaded\n");
1128 return 0;
1129
1130}
1131
d0be1227
JA		 1132static const struct blk_mq_ops mspro_mq_ops = {
1133 .queue_rq = mspro_queue_rq,
1134};
1135
baf8532a
AD		 1136static int mspro_block_init_disk(struct memstick_dev *card)
1137{
1138 struct mspro_block_data *msb = memstick_get_drvdata(card);
baf8532a
AD		 1139 struct mspro_devinfo *dev_info = NULL;
1140 struct mspro_sys_info *sys_info = NULL;
1141 struct mspro_sys_attr *s_attr = NULL;
1142 int rc, disk_id;
baf8532a
AD		 1143 unsigned long capacity;
1144
baf8532a
AD		 1145 for (rc = 0; msb->attr_group.attrs[rc]; ++rc) {
1146 s_attr = mspro_from_sysfs_attr(msb->attr_group.attrs[rc]);
1147
1148 if (s_attr->id == MSPRO_BLOCK_ID_DEVINFO)
1149 dev_info = s_attr->data;
1150 else if (s_attr->id == MSPRO_BLOCK_ID_SYSINFO)
1151 sys_info = s_attr->data;
1152 }
1153
1154 if (!dev_info || !sys_info)
1155 return -ENODEV;
1156
1157 msb->cylinders = be16_to_cpu(dev_info->cylinders);
1158 msb->heads = be16_to_cpu(dev_info->heads);
1159 msb->sectors_per_track = be16_to_cpu(dev_info->sectors_per_track);
1160
1161 msb->page_size = be16_to_cpu(sys_info->unit_size);
1162
d8256d48 1163 mutex_lock(&mspro_block_disk_lock);
7b51f478 1164 disk_id = idr_alloc(&mspro_block_disk_idr, card, 0, 256, GFP_KERNEL);
baf8532a 1165 mutex_unlock(&mspro_block_disk_lock);
7b51f478
TH		 1166 if (disk_id < 0)
1167 return disk_id;
baf8532a 1168
51ed5bd5
CH		 1169 rc = blk_mq_alloc_sq_tag_set(&msb->tag_set, &mspro_mq_ops, 2,
1170 BLK_MQ_F_SHOULD_MERGE);
1171 if (rc)
baf8532a 1172 goto out_release_id;
baf8532a 1173
51ed5bd5
CH		 1174 msb->disk = blk_mq_alloc_disk(&msb->tag_set, card);
1175 if (IS_ERR(msb->disk)) {
1176 rc = PTR_ERR(msb->disk);
1177 goto out_free_tag_set;
baf8532a 1178 }
51ed5bd5 1179 msb->queue = msb->disk->queue;
baf8532a 1180
086fa5ff 1181 blk_queue_max_hw_sectors(msb->queue, MSPRO_BLOCK_MAX_PAGES);
8a78362c 1182 blk_queue_max_segments(msb->queue, MSPRO_BLOCK_MAX_SEGS);
baf8532a
AD		 1183 blk_queue_max_segment_size(msb->queue,
1184 MSPRO_BLOCK_MAX_PAGES * msb->page_size);
1185
1186 msb->disk->major = major;
8e82f8c3 1187 msb->disk->first_minor = disk_id << MSPRO_BLOCK_PART_SHIFT;
51ed5bd5 1188 msb->disk->minors = 1 << MSPRO_BLOCK_PART_SHIFT;
baf8532a 1189 msb->disk->fops = &ms_block_bdops;
baf8532a 1190 msb->disk->private_data = msb;
baf8532a
AD		 1191
1192 sprintf(msb->disk->disk_name, "mspblk%d", disk_id);
1193
e1defc4f 1194 blk_queue_logical_block_size(msb->queue, msb->page_size);
baf8532a
AD		 1195
1196 capacity = be16_to_cpu(sys_info->user_block_count);
1197 capacity *= be16_to_cpu(sys_info->block_size);
1198 capacity *= msb->page_size >> 9;
1199 set_capacity(msb->disk, capacity);
1200 dev_dbg(&card->dev, "capacity set %ld\n", capacity);
baf8532a 1201
6dab421b
CH		 1202 if (msb->read_only)
1203 set_disk_ro(msb->disk, true);
1204
b3f8eb6e
LC		 1205 rc = device_add_disk(&card->dev, msb->disk, NULL);
1206 if (rc)
1207 goto out_cleanup_disk;
baf8532a
AD		 1208 msb->active = 1;
1209 return 0;
1210
b3f8eb6e
LC		 1211out_cleanup_disk:
1212 blk_cleanup_disk(msb->disk);
51ed5bd5
CH		 1213out_free_tag_set:
1214 blk_mq_free_tag_set(&msb->tag_set);
baf8532a
AD		 1215out_release_id:
1216 mutex_lock(&mspro_block_disk_lock);
1217 idr_remove(&mspro_block_disk_idr, disk_id);
1218 mutex_unlock(&mspro_block_disk_lock);
1219 return rc;
1220}
1221
1222static void mspro_block_data_clear(struct mspro_block_data *msb)
1223{
1224 int cnt;
1225 struct mspro_sys_attr *s_attr;
1226
1227 if (msb->attr_group.attrs) {
1228 for (cnt = 0; msb->attr_group.attrs[cnt]; ++cnt) {
1229 s_attr = mspro_from_sysfs_attr(msb->attr_group
1230 .attrs[cnt]);
1231 kfree(s_attr->data);
1232 kfree(s_attr);
1233 }
1234 kfree(msb->attr_group.attrs);
1235 }
1236
1237 msb->card = NULL;
1238}
1239
1240static int mspro_block_check_card(struct memstick_dev *card)
1241{
1242 struct mspro_block_data *msb = memstick_get_drvdata(card);
1243
1244 return (msb->active == 1);
1245}
1246
1247static int mspro_block_probe(struct memstick_dev *card)
1248{
1249 struct mspro_block_data *msb;
1250 int rc = 0;
1251
1252 msb = kzalloc(sizeof(struct mspro_block_data), GFP_KERNEL);
1253 if (!msb)
1254 return -ENOMEM;
1255 memstick_set_drvdata(card, msb);
1256 msb->card = card;
f1d82698 1257 spin_lock_init(&msb->q_lock);
baf8532a
AD		 1258
1259 rc = mspro_block_init_card(card);
1260
1261 if (rc)
1262 goto out_free;
1263
1264 rc = sysfs_create_group(&card->dev.kobj, &msb->attr_group);
1265 if (rc)
1266 goto out_free;
1267
1268 rc = mspro_block_init_disk(card);
1269 if (!rc) {
1270 card->check = mspro_block_check_card;
17017d8d
AD		 1271 card->stop = mspro_block_stop;
1272 card->start = mspro_block_start;
baf8532a
AD		 1273 return 0;
1274 }
1275
1276 sysfs_remove_group(&card->dev.kobj, &msb->attr_group);
1277out_free:
1278 memstick_set_drvdata(card, NULL);
1279 mspro_block_data_clear(msb);
1280 kfree(msb);
1281 return rc;
1282}
1283
1284static void mspro_block_remove(struct memstick_dev *card)
1285{
1286 struct mspro_block_data *msb = memstick_get_drvdata(card);
baf8532a
AD		 1287 unsigned long flags;
1288
baf8532a 1289 spin_lock_irqsave(&msb->q_lock, flags);
f1d82698 1290 msb->eject = 1;
baf8532a 1291 spin_unlock_irqrestore(&msb->q_lock, flags);
d0be1227 1292 blk_mq_start_hw_queues(msb->queue);
baf8532a 1293
d862b13b
ML		 1294 del_gendisk(msb->disk);
1295 dev_dbg(&card->dev, "mspro block remove\n");
1296
baf8532a 1297 blk_cleanup_queue(msb->queue);
d0be1227 1298 blk_mq_free_tag_set(&msb->tag_set);
f1d82698 1299 msb->queue = NULL;
baf8532a
AD		 1300
1301 sysfs_remove_group(&card->dev.kobj, &msb->attr_group);
1302
1303 mutex_lock(&mspro_block_disk_lock);
1304 mspro_block_data_clear(msb);
1305 mutex_unlock(&mspro_block_disk_lock);
1306
185ed423 1307 put_disk(msb->disk);
baf8532a
AD		 1308 memstick_set_drvdata(card, NULL);
1309}
1310
1311#ifdef CONFIG_PM
1312
1313static int mspro_block_suspend(struct memstick_dev *card, pm_message_t state)
1314{
1315 struct mspro_block_data *msb = memstick_get_drvdata(card);
baf8532a
AD		 1316 unsigned long flags;
1317
d0be1227
JA		 1318 blk_mq_stop_hw_queues(msb->queue);
1319
baf8532a 1320 spin_lock_irqsave(&msb->q_lock, flags);
f1d82698 1321 msb->active = 0;
baf8532a
AD		 1322 spin_unlock_irqrestore(&msb->q_lock, flags);
1323
baf8532a
AD		 1324 return 0;
1325}
1326
1327static int mspro_block_resume(struct memstick_dev *card)
1328{
1329 struct mspro_block_data *msb = memstick_get_drvdata(card);
baf8532a
AD		 1330 int rc = 0;
1331
1332#ifdef CONFIG_MEMSTICK_UNSAFE_RESUME
1333
1334 struct mspro_block_data *new_msb;
1335 struct memstick_host *host = card->host;
1336 struct mspro_sys_attr *s_attr, *r_attr;
1337 unsigned char cnt;
1338
1339 mutex_lock(&host->lock);
1340 new_msb = kzalloc(sizeof(struct mspro_block_data), GFP_KERNEL);
1341 if (!new_msb) {
1342 rc = -ENOMEM;
1343 goto out_unlock;
1344 }
1345
1346 new_msb->card = card;
1347 memstick_set_drvdata(card, new_msb);
8c87dab9
JJB		 1348 rc = mspro_block_init_card(card);
1349 if (rc)
baf8532a
AD		 1350 goto out_free;
1351
1352 for (cnt = 0; new_msb->attr_group.attrs[cnt]
1353 && msb->attr_group.attrs[cnt]; ++cnt) {
1354 s_attr = mspro_from_sysfs_attr(new_msb->attr_group.attrs[cnt]);
1355 r_attr = mspro_from_sysfs_attr(msb->attr_group.attrs[cnt]);
1356
1357 if (s_attr->id == MSPRO_BLOCK_ID_SYSINFO
1358 && r_attr->id == s_attr->id) {
1359 if (memcmp(s_attr->data, r_attr->data, s_attr->size))
1360 break;
1361
f1d82698 1362 msb->active = 1;
baf8532a
AD		 1363 break;
1364 }
1365 }
1366
1367out_free:
1368 memstick_set_drvdata(card, msb);
1369 mspro_block_data_clear(new_msb);
1370 kfree(new_msb);
1371out_unlock:
1372 mutex_unlock(&host->lock);
1373
1374#endif /* CONFIG_MEMSTICK_UNSAFE_RESUME */
1375
d0be1227 1376 blk_mq_start_hw_queues(msb->queue);
baf8532a
AD		 1377 return rc;
1378}
1379
1380#else
1381
1382#define mspro_block_suspend NULL
1383#define mspro_block_resume NULL
1384
1385#endif /* CONFIG_PM */
1386
1387static struct memstick_device_id mspro_block_id_tbl[] = {
1388 {MEMSTICK_MATCH_ALL, MEMSTICK_TYPE_PRO, MEMSTICK_CATEGORY_STORAGE_DUO,
8e82f8c3 1389 MEMSTICK_CLASS_DUO},
baf8532a
AD		 1390 {}
1391};
1392
1393
1394static struct memstick_driver mspro_block_driver = {
1395 .driver = {
1396 .name = DRIVER_NAME,
1397 .owner = THIS_MODULE
1398 },
1399 .id_table = mspro_block_id_tbl,
1400 .probe = mspro_block_probe,
1401 .remove = mspro_block_remove,
1402 .suspend = mspro_block_suspend,
1403 .resume = mspro_block_resume
1404};
1405
1406static int __init mspro_block_init(void)
1407{
1408 int rc = -ENOMEM;
1409
1410 rc = register_blkdev(major, DRIVER_NAME);
1411 if (rc < 0) {
1412 printk(KERN_ERR DRIVER_NAME ": failed to register "
1413 "major %d, error %d\n", major, rc);
1414 return rc;
1415 }
1416 if (!major)
1417 major = rc;
1418
1419 rc = memstick_register_driver(&mspro_block_driver);
1420 if (rc)
1421 unregister_blkdev(major, DRIVER_NAME);
1422 return rc;
1423}
1424
1425static void __exit mspro_block_exit(void)
1426{
1427 memstick_unregister_driver(&mspro_block_driver);
1428 unregister_blkdev(major, DRIVER_NAME);
1429 idr_destroy(&mspro_block_disk_idr);
1430}
1431
1432module_init(mspro_block_init);
1433module_exit(mspro_block_exit);
1434
1435MODULE_LICENSE("GPL");
1436MODULE_AUTHOR("Alex Dubov");
1437MODULE_DESCRIPTION("Sony MemoryStickPro block device driver");
1438MODULE_DEVICE_TABLE(memstick, mspro_block_id_tbl);
Linux 6.x block layer and io_uring tree(s)